Fluorophore |
Brightness Index (1=dim, 5=bright) |
Exmax |
Emmax |
Comments |
Spark Blue™ 515 |
2 |
506 nm |
515 nm |
Spark Blue™ 515 is a blue laser option that emits at 515 nm. As its peak emission is approximately 10 nm lower than dyes like FITC and Alexa Fluor® 488, it can be unmixed from them on spectral instruments. |
Alexa Fluor® 488 |
3 |
495 nm |
519 nm |
Alexa Fluor® 488 is a fluorescent molecule with exceptional photostability. For flow cytometry it has very similar brightness and emission properties compared to FITC, but is advantageous for microscopy applications. |
KIRAVIA Blue 520™ |
4 |
488 nm |
520 nm |
KIRAVIA Blue 520™ is bright, on par with BD Horizon™ BB515 and, on average, is twice as bright as a FITC conjugate. In a multicolor panel, it is excited by the 488 nm blue laser and spectrally identical to FITC, only exhibiting significant spreading into Spark Blue™ 550. |
FITC |
3 |
494 nm |
520 nm |
FITC (fluorescein isothiocyanate) is a small synthetic organic fluorophore with moderate brightness, suitable for flow and microscopy applications. It is sensitive to pH changes. It cannot be used with Alexa Fluor® 488. |
PerCP |
1 |
482 nm |
678 nm |
PerCP is a naturally-derived carotenoid pigment found in photosynthetic dinoflagellates. It is not recommended for high powered lasers >25 mW due to its sensitivity to photobleaching. PerCP has overlapping emission with PE/Cyanine5, so these should not be used on the same laser. |
PerCP/Cyanine5.5 |
2 |
482 nm |
690 nm |
PerCP/Cyanine5.5 is tandem conjugate of PerCP and the cyanine dye, Cyanine5.5. Unlike PerCP, it is quite photostable and can be used with high powered lasers. Of the all tandems, it is the most photostable and resistant to degradation by fixation. PerCP and PerCP/Cyanine5.5 have significant overlap and are not recommended for use together. |
Spark PLUS B550™ |
4 |
516 nm |
540 nm |
Spark PLUS B550™ is formulated for brighter signal and superior stability, maximizing signal from the blue laser with minimal yellow/green cross-excitation and spillover. |
Spark Blue™ 550 |
1 |
516 nm |
540 nm |
Spark Blue™ 550 is designed to be used in high level (>22 color) flow cytometry assays on a spectral unmixing cytometer. It is excited off of the 488 nm blue laser and emits between the peak emission of FITC and PE. Emission off the 405 nm violet laser adds to the accuracy with which the fluorophore can be unmixed. It can be used as an alternative to Alexa Fluor® 532. |
Spark Blue™ 574 |
1 |
506 nm |
574 nm |
Spark Blue™ 574 is ideal for 5-laser spectral unmixing cytometers as it is mainly excited by the 488 nm blue laser. With minimal excitation from the 561 yellow/green laser, this allows it to be unmixed from PE. Spark Blue™ 574 has a peak emission of 574 nm. |
PE |
5 |
565 nm |
578 nm |
R-Phycoerythrin (PE) is a pigment derived from red algae. It is a large 240 kD protein that contains 23 phycoerthrobilin chromophores per molecule. It is extremely bright for flow cytometry, but poor photostability makes it unsuitable for microscopy. PE and its tandem are also sensitive to denaturation by fixation. Because of its wide excitation range, it can be excited by the 488, 532, and 561 nm lasers. |
PE/Dazzle™ 594 |
5 |
565 nm |
610 nm |
PE/Dazzle™ 594 is a tandem conjugate of PE and BioLegend’s proprietary fluorophore DZL594. Similar to PE, it is extremely bright for flow cytometry. It is spectrally similar to PE-Texas Red®, BD Horizon™ PE-CF594, and PE-eFluor® 610. |
PE/Fire™ 640 |
4 |
565 nm |
639 nm |
PE/Fire™ 640 has a distinct emission peak between the peaks of PE/Dazzle™ 594 and PE/Cyanine5 which allows it to be unmixed from highly overlapping fluorophores in spectral cytometry applications. Because it has a bright signal, it is ideal for labeling an antigen that is expressed on a small subset of cells. |
PE/Cyanine5 |
5 |
565 nm |
667 nm |
PE/Cyanine5 is a tandem conjugate of PE and the cyanine dye, Cyanine5. Similar to PE, it is bright for flow cytometry, but is sensitive to photobleaching and not recommended for microscopy. Cyanine5 has been known to non-specifically bind to Fc receptors. On some instruments, it is not recommended for use with APC, due to their overlapping emissions. |
PE/Fire 700™ |
5 |
565 nm |
695 nm |
PE/Fire™ 700 is an intensely bright fluorophore that is best suited for detecting antigens that are lowly or discreetly expressed. It is best suited for spectral cytometers but can also be used on conventional cytometers that are able to detect PE/Cyanine5.5. While it is a very bright fluor, it also exhibits significant spillover into all other PerCP and PE tandems, as well as Spark NIR™ 685 and Alexa Fluor® 700. |
PE/Fire 744™ |
5 |
565 nm |
744 nm |
PE/Fire™ 744 is excited by the blue and yellow/green lasers and has a max emission of 744 nm. It can be unmixed from PerCP/Fire™ 780 and PerCP/Fire™ 806 on spectral instruments. |
PE/Cyanine7 |
4 |
565 nm |
774 nm |
PE/Cyanine7 is a tandem conjugate of PE and the cyanine dye, Cyanine7. Similar to PE, it is bright for flow cytometry, but is sensitive to photobleaching and not recommended for microscopy. This tandem is particularly sensitive to light exposure and prolonged fixation. |
PerCP/Fire™ 780 |
4 |
488 nm |
774 nm |
PerCP/Fire™ 780 is a blue laser option that emits deep in the far red at 774 nm. It can be used with PE/Cyanine7 on instruments with blue and yellow/green lasers. It can be unmixed from PerCP/Fire™ 806 on spectral instruments. |
PerCP/Fire™ 806 |
4 |
488 nm |
806 nm |
PerCP/Fire™ 806 is a blue laser option that emits deep in the far red at 806 nm. It can be unmixed from dyes like PE/Fire™ 810 and PE/Cyanine7 on spectral instruments. |
PE/Fire™ 810 |
4 |
565 nm |
806 nm |
PE/Fire™ 810 expands the range of spectral detection further than any of our previous fluorophores, emitting even beyond the range of PE/Cyanine7. PE/Fire™ 810 is excited by the blue and yellow/green lasers and can utilized for nearly any antigen since it has little spectral overlap with other fluorophores. |
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